Q60Short answer
A hydrocarbon of molecular mass 72 g mol gives a single monochloro derivative and two dichloro derivatives on photo chlorination. Give the structure of the hydrocarbon.
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C5H12, pentane has molecular mass 72 g mol , i.e. the isomer of pentane which yields single monochloro derivative should have all the 12 hydrogens equivalent. The hydrocarbon is Monochloro derivative 151 Haloalkanes and Haloarenes Dichloro derivatives (i) (ii)